<template>
    <el-row :gutter="12">
  <el-col :span="8">
    <el-card shadow="always">
      总是显示
    </el-card>
  </el-col>
  <el-col :span="8">
    <el-card shadow="hover">
      鼠标悬浮时显示
    </el-card>
  </el-col>
  <el-col :span="8">
    <el-card shadow="never">
      从不显示
    </el-card>
  </el-col>
</el-row>
</template>